| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * arch/sparc64/kernel/signal.c |
| * |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net) |
| * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) |
| * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) |
| * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| */ |
| |
| #include <linux/sched.h> |
| #include <linux/kernel.h> |
| #include <linux/signal.h> |
| #include <linux/errno.h> |
| #include <linux/wait.h> |
| #include <linux/ptrace.h> |
| #include <linux/tracehook.h> |
| #include <linux/unistd.h> |
| #include <linux/mm.h> |
| #include <linux/tty.h> |
| #include <linux/binfmts.h> |
| #include <linux/bitops.h> |
| #include <linux/context_tracking.h> |
| |
| #include <linux/uaccess.h> |
| #include <asm/ptrace.h> |
| #include <asm/pgtable.h> |
| #include <asm/fpumacro.h> |
| #include <asm/uctx.h> |
| #include <asm/siginfo.h> |
| #include <asm/visasm.h> |
| #include <asm/switch_to.h> |
| #include <asm/cacheflush.h> |
| |
| #include "sigutil.h" |
| #include "systbls.h" |
| #include "kernel.h" |
| #include "entry.h" |
| |
| /* {set, get}context() needed for 64-bit SparcLinux userland. */ |
| asmlinkage void sparc64_set_context(struct pt_regs *regs) |
| { |
| struct ucontext __user *ucp = (struct ucontext __user *) |
| regs->u_regs[UREG_I0]; |
| enum ctx_state prev_state = exception_enter(); |
| mc_gregset_t __user *grp; |
| unsigned long pc, npc, tstate; |
| unsigned long fp, i7; |
| unsigned char fenab; |
| int err; |
| |
| synchronize_user_stack(); |
| if (get_thread_wsaved() || |
| (((unsigned long)ucp) & (sizeof(unsigned long)-1)) || |
| (!__access_ok(ucp, sizeof(*ucp)))) |
| goto do_sigsegv; |
| grp = &ucp->uc_mcontext.mc_gregs; |
| err = __get_user(pc, &((*grp)[MC_PC])); |
| err |= __get_user(npc, &((*grp)[MC_NPC])); |
| if (err || ((pc | npc) & 3)) |
| goto do_sigsegv; |
| if (regs->u_regs[UREG_I1]) { |
| sigset_t set; |
| |
| if (_NSIG_WORDS == 1) { |
| if (__get_user(set.sig[0], &ucp->uc_sigmask.sig[0])) |
| goto do_sigsegv; |
| } else { |
| if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(sigset_t))) |
| goto do_sigsegv; |
| } |
| set_current_blocked(&set); |
| } |
| if (test_thread_flag(TIF_32BIT)) { |
| pc &= 0xffffffff; |
| npc &= 0xffffffff; |
| } |
| regs->tpc = pc; |
| regs->tnpc = npc; |
| err |= __get_user(regs->y, &((*grp)[MC_Y])); |
| err |= __get_user(tstate, &((*grp)[MC_TSTATE])); |
| regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC); |
| regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC)); |
| err |= __get_user(regs->u_regs[UREG_G1], (&(*grp)[MC_G1])); |
| err |= __get_user(regs->u_regs[UREG_G2], (&(*grp)[MC_G2])); |
| err |= __get_user(regs->u_regs[UREG_G3], (&(*grp)[MC_G3])); |
| err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4])); |
| err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5])); |
| err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6])); |
| |
| /* Skip %g7 as that's the thread register in userspace. */ |
| |
| err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0])); |
| err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1])); |
| err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2])); |
| err |= __get_user(regs->u_regs[UREG_I3], (&(*grp)[MC_O3])); |
| err |= __get_user(regs->u_regs[UREG_I4], (&(*grp)[MC_O4])); |
| err |= __get_user(regs->u_regs[UREG_I5], (&(*grp)[MC_O5])); |
| err |= __get_user(regs->u_regs[UREG_I6], (&(*grp)[MC_O6])); |
| err |= __get_user(regs->u_regs[UREG_I7], (&(*grp)[MC_O7])); |
| |
| err |= __get_user(fp, &(ucp->uc_mcontext.mc_fp)); |
| err |= __get_user(i7, &(ucp->uc_mcontext.mc_i7)); |
| err |= __put_user(fp, |
| (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6]))); |
| err |= __put_user(i7, |
| (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7]))); |
| |
| err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); |
| if (fenab) { |
| unsigned long *fpregs = current_thread_info()->fpregs; |
| unsigned long fprs; |
| |
| fprs_write(0); |
| err |= __get_user(fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); |
| if (fprs & FPRS_DL) |
| err |= copy_from_user(fpregs, |
| &(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs), |
| (sizeof(unsigned int) * 32)); |
| if (fprs & FPRS_DU) |
| err |= copy_from_user(fpregs+16, |
| ((unsigned long __user *)&(ucp->uc_mcontext.mc_fpregs.mcfpu_fregs))+16, |
| (sizeof(unsigned int) * 32)); |
| err |= __get_user(current_thread_info()->xfsr[0], |
| &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); |
| err |= __get_user(current_thread_info()->gsr[0], |
| &(ucp->uc_mcontext.mc_fpregs.mcfpu_gsr)); |
| regs->tstate &= ~TSTATE_PEF; |
| } |
| if (err) |
| goto do_sigsegv; |
| out: |
| exception_exit(prev_state); |
| return; |
| do_sigsegv: |
| force_sig(SIGSEGV); |
| goto out; |
| } |
| |
| asmlinkage void sparc64_get_context(struct pt_regs *regs) |
| { |
| struct ucontext __user *ucp = (struct ucontext __user *) |
| regs->u_regs[UREG_I0]; |
| enum ctx_state prev_state = exception_enter(); |
| mc_gregset_t __user *grp; |
| mcontext_t __user *mcp; |
| unsigned long fp, i7; |
| unsigned char fenab; |
| int err; |
| |
| synchronize_user_stack(); |
| if (get_thread_wsaved() || clear_user(ucp, sizeof(*ucp))) |
| goto do_sigsegv; |
| |
| #if 1 |
| fenab = 0; /* IMO get_context is like any other system call, thus modifies FPU state -jj */ |
| #else |
| fenab = (current_thread_info()->fpsaved[0] & FPRS_FEF); |
| #endif |
| |
| mcp = &ucp->uc_mcontext; |
| grp = &mcp->mc_gregs; |
| |
| /* Skip over the trap instruction, first. */ |
| if (test_thread_flag(TIF_32BIT)) { |
| regs->tpc = (regs->tnpc & 0xffffffff); |
| regs->tnpc = (regs->tnpc + 4) & 0xffffffff; |
| } else { |
| regs->tpc = regs->tnpc; |
| regs->tnpc += 4; |
| } |
| err = 0; |
| if (_NSIG_WORDS == 1) |
| err |= __put_user(current->blocked.sig[0], |
| (unsigned long __user *)&ucp->uc_sigmask); |
| else |
| err |= __copy_to_user(&ucp->uc_sigmask, ¤t->blocked, |
| sizeof(sigset_t)); |
| |
| err |= __put_user(regs->tstate, &((*grp)[MC_TSTATE])); |
| err |= __put_user(regs->tpc, &((*grp)[MC_PC])); |
| err |= __put_user(regs->tnpc, &((*grp)[MC_NPC])); |
| err |= __put_user(regs->y, &((*grp)[MC_Y])); |
| err |= __put_user(regs->u_regs[UREG_G1], &((*grp)[MC_G1])); |
| err |= __put_user(regs->u_regs[UREG_G2], &((*grp)[MC_G2])); |
| err |= __put_user(regs->u_regs[UREG_G3], &((*grp)[MC_G3])); |
| err |= __put_user(regs->u_regs[UREG_G4], &((*grp)[MC_G4])); |
| err |= __put_user(regs->u_regs[UREG_G5], &((*grp)[MC_G5])); |
| err |= __put_user(regs->u_regs[UREG_G6], &((*grp)[MC_G6])); |
| err |= __put_user(regs->u_regs[UREG_G7], &((*grp)[MC_G7])); |
| err |= __put_user(regs->u_regs[UREG_I0], &((*grp)[MC_O0])); |
| err |= __put_user(regs->u_regs[UREG_I1], &((*grp)[MC_O1])); |
| err |= __put_user(regs->u_regs[UREG_I2], &((*grp)[MC_O2])); |
| err |= __put_user(regs->u_regs[UREG_I3], &((*grp)[MC_O3])); |
| err |= __put_user(regs->u_regs[UREG_I4], &((*grp)[MC_O4])); |
| err |= __put_user(regs->u_regs[UREG_I5], &((*grp)[MC_O5])); |
| err |= __put_user(regs->u_regs[UREG_I6], &((*grp)[MC_O6])); |
| err |= __put_user(regs->u_regs[UREG_I7], &((*grp)[MC_O7])); |
| |
| err |= __get_user(fp, |
| (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[6]))); |
| err |= __get_user(i7, |
| (&(((struct reg_window __user *)(STACK_BIAS+regs->u_regs[UREG_I6]))->ins[7]))); |
| err |= __put_user(fp, &(mcp->mc_fp)); |
| err |= __put_user(i7, &(mcp->mc_i7)); |
| |
| err |= __put_user(fenab, &(mcp->mc_fpregs.mcfpu_enab)); |
| if (fenab) { |
| unsigned long *fpregs = current_thread_info()->fpregs; |
| unsigned long fprs; |
| |
| fprs = current_thread_info()->fpsaved[0]; |
| if (fprs & FPRS_DL) |
| err |= copy_to_user(&(mcp->mc_fpregs.mcfpu_fregs), fpregs, |
| (sizeof(unsigned int) * 32)); |
| if (fprs & FPRS_DU) |
| err |= copy_to_user( |
| ((unsigned long __user *)&(mcp->mc_fpregs.mcfpu_fregs))+16, fpregs+16, |
| (sizeof(unsigned int) * 32)); |
| err |= __put_user(current_thread_info()->xfsr[0], &(mcp->mc_fpregs.mcfpu_fsr)); |
| err |= __put_user(current_thread_info()->gsr[0], &(mcp->mc_fpregs.mcfpu_gsr)); |
| err |= __put_user(fprs, &(mcp->mc_fpregs.mcfpu_fprs)); |
| } |
| if (err) |
| goto do_sigsegv; |
| out: |
| exception_exit(prev_state); |
| return; |
| do_sigsegv: |
| force_sig(SIGSEGV); |
| goto out; |
| } |
| |
| /* Checks if the fp is valid. We always build rt signal frames which |
| * are 16-byte aligned, therefore we can always enforce that the |
| * restore frame has that property as well. |
| */ |
| static bool invalid_frame_pointer(void __user *fp) |
| { |
| if (((unsigned long) fp) & 15) |
| return true; |
| return false; |
| } |
| |
| struct rt_signal_frame { |
| struct sparc_stackf ss; |
| siginfo_t info; |
| struct pt_regs regs; |
| __siginfo_fpu_t __user *fpu_save; |
| stack_t stack; |
| sigset_t mask; |
| __siginfo_rwin_t *rwin_save; |
| }; |
| |
| void do_rt_sigreturn(struct pt_regs *regs) |
| { |
| unsigned long tpc, tnpc, tstate, ufp; |
| struct rt_signal_frame __user *sf; |
| __siginfo_fpu_t __user *fpu_save; |
| __siginfo_rwin_t __user *rwin_save; |
| sigset_t set; |
| int err; |
| |
| /* Always make any pending restarted system calls return -EINTR */ |
| current->restart_block.fn = do_no_restart_syscall; |
| |
| synchronize_user_stack (); |
| sf = (struct rt_signal_frame __user *) |
| (regs->u_regs [UREG_FP] + STACK_BIAS); |
| |
| /* 1. Make sure we are not getting garbage from the user */ |
| if (invalid_frame_pointer(sf)) |
| goto segv; |
| |
| if (get_user(ufp, &sf->regs.u_regs[UREG_FP])) |
| goto segv; |
| |
| if ((ufp + STACK_BIAS) & 0x7) |
| goto segv; |
| |
| err = __get_user(tpc, &sf->regs.tpc); |
| err |= __get_user(tnpc, &sf->regs.tnpc); |
| if (test_thread_flag(TIF_32BIT)) { |
| tpc &= 0xffffffff; |
| tnpc &= 0xffffffff; |
| } |
| err |= ((tpc | tnpc) & 3); |
| |
| /* 2. Restore the state */ |
| err |= __get_user(regs->y, &sf->regs.y); |
| err |= __get_user(tstate, &sf->regs.tstate); |
| err |= copy_from_user(regs->u_regs, sf->regs.u_regs, sizeof(regs->u_regs)); |
| |
| /* User can only change condition codes and %asi in %tstate. */ |
| regs->tstate &= ~(TSTATE_ASI | TSTATE_ICC | TSTATE_XCC); |
| regs->tstate |= (tstate & (TSTATE_ASI | TSTATE_ICC | TSTATE_XCC)); |
| |
| err |= __get_user(fpu_save, &sf->fpu_save); |
| if (!err && fpu_save) |
| err |= restore_fpu_state(regs, fpu_save); |
| |
| err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t)); |
| err |= restore_altstack(&sf->stack); |
| if (err) |
| goto segv; |
| |
| err |= __get_user(rwin_save, &sf->rwin_save); |
| if (!err && rwin_save) { |
| if (restore_rwin_state(rwin_save)) |
| goto segv; |
| } |
| |
| regs->tpc = tpc; |
| regs->tnpc = tnpc; |
| |
| /* Prevent syscall restart. */ |
| pt_regs_clear_syscall(regs); |
| |
| set_current_blocked(&set); |
| return; |
| segv: |
| force_sig(SIGSEGV); |
| } |
| |
| static inline void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize) |
| { |
| unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS; |
| |
| /* |
| * If we are on the alternate signal stack and would overflow it, don't. |
| * Return an always-bogus address instead so we will die with SIGSEGV. |
| */ |
| if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) |
| return (void __user *) -1L; |
| |
| /* This is the X/Open sanctioned signal stack switching. */ |
| sp = sigsp(sp, ksig) - framesize; |
| |
| /* Always align the stack frame. This handles two cases. First, |
| * sigaltstack need not be mindful of platform specific stack |
| * alignment. Second, if we took this signal because the stack |
| * is not aligned properly, we'd like to take the signal cleanly |
| * and report that. |
| */ |
| sp &= ~15UL; |
| |
| return (void __user *) sp; |
| } |
| |
| static inline int |
| setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs) |
| { |
| struct rt_signal_frame __user *sf; |
| int wsaved, err, sf_size; |
| void __user *tail; |
| |
| /* 1. Make sure everything is clean */ |
| synchronize_user_stack(); |
| save_and_clear_fpu(); |
| |
| wsaved = get_thread_wsaved(); |
| |
| sf_size = sizeof(struct rt_signal_frame); |
| if (current_thread_info()->fpsaved[0] & FPRS_FEF) |
| sf_size += sizeof(__siginfo_fpu_t); |
| if (wsaved) |
| sf_size += sizeof(__siginfo_rwin_t); |
| sf = (struct rt_signal_frame __user *) |
| get_sigframe(ksig, regs, sf_size); |
| |
| if (invalid_frame_pointer (sf)) { |
| if (show_unhandled_signals) |
| pr_info("%s[%d] bad frame in setup_rt_frame: %016lx TPC %016lx O7 %016lx\n", |
| current->comm, current->pid, (unsigned long)sf, |
| regs->tpc, regs->u_regs[UREG_I7]); |
| force_sigsegv(ksig->sig); |
| return -EINVAL; |
| } |
| |
| tail = (sf + 1); |
| |
| /* 2. Save the current process state */ |
| err = copy_to_user(&sf->regs, regs, sizeof (*regs)); |
| |
| if (current_thread_info()->fpsaved[0] & FPRS_FEF) { |
| __siginfo_fpu_t __user *fpu_save = tail; |
| tail += sizeof(__siginfo_fpu_t); |
| err |= save_fpu_state(regs, fpu_save); |
| err |= __put_user((u64)fpu_save, &sf->fpu_save); |
| } else { |
| err |= __put_user(0, &sf->fpu_save); |
| } |
| if (wsaved) { |
| __siginfo_rwin_t __user *rwin_save = tail; |
| tail += sizeof(__siginfo_rwin_t); |
| err |= save_rwin_state(wsaved, rwin_save); |
| err |= __put_user((u64)rwin_save, &sf->rwin_save); |
| set_thread_wsaved(0); |
| } else { |
| err |= __put_user(0, &sf->rwin_save); |
| } |
| |
| /* Setup sigaltstack */ |
| err |= __save_altstack(&sf->stack, regs->u_regs[UREG_FP]); |
| |
| err |= copy_to_user(&sf->mask, sigmask_to_save(), sizeof(sigset_t)); |
| |
| if (!wsaved) { |
| err |= copy_in_user((u64 __user *)sf, |
| (u64 __user *)(regs->u_regs[UREG_FP] + |
| STACK_BIAS), |
| sizeof(struct reg_window)); |
| } else { |
| struct reg_window *rp; |
| |
| rp = ¤t_thread_info()->reg_window[wsaved - 1]; |
| err |= copy_to_user(sf, rp, sizeof(struct reg_window)); |
| } |
| if (ksig->ka.sa.sa_flags & SA_SIGINFO) |
| err |= copy_siginfo_to_user(&sf->info, &ksig->info); |
| else { |
| err |= __put_user(ksig->sig, &sf->info.si_signo); |
| err |= __put_user(SI_NOINFO, &sf->info.si_code); |
| } |
| if (err) |
| return err; |
| |
| /* 3. signal handler back-trampoline and parameters */ |
| regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS; |
| regs->u_regs[UREG_I0] = ksig->sig; |
| regs->u_regs[UREG_I1] = (unsigned long) &sf->info; |
| |
| /* The sigcontext is passed in this way because of how it |
| * is defined in GLIBC's /usr/include/bits/sigcontext.h |
| * for sparc64. It includes the 128 bytes of siginfo_t. |
| */ |
| regs->u_regs[UREG_I2] = (unsigned long) &sf->info; |
| |
| /* 5. signal handler */ |
| regs->tpc = (unsigned long) ksig->ka.sa.sa_handler; |
| regs->tnpc = (regs->tpc + 4); |
| if (test_thread_flag(TIF_32BIT)) { |
| regs->tpc &= 0xffffffff; |
| regs->tnpc &= 0xffffffff; |
| } |
| /* 4. return to kernel instructions */ |
| regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer; |
| return 0; |
| } |
| |
| static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs, |
| struct sigaction *sa) |
| { |
| switch (regs->u_regs[UREG_I0]) { |
| case ERESTART_RESTARTBLOCK: |
| case ERESTARTNOHAND: |
| no_system_call_restart: |
| regs->u_regs[UREG_I0] = EINTR; |
| regs->tstate |= (TSTATE_ICARRY|TSTATE_XCARRY); |
| break; |
| case ERESTARTSYS: |
| if (!(sa->sa_flags & SA_RESTART)) |
| goto no_system_call_restart; |
| /* fallthrough */ |
| case ERESTARTNOINTR: |
| regs->u_regs[UREG_I0] = orig_i0; |
| regs->tpc -= 4; |
| regs->tnpc -= 4; |
| } |
| } |
| |
| /* Note that 'init' is a special process: it doesn't get signals it doesn't |
| * want to handle. Thus you cannot kill init even with a SIGKILL even by |
| * mistake. |
| */ |
| static void do_signal(struct pt_regs *regs, unsigned long orig_i0) |
| { |
| struct ksignal ksig; |
| int restart_syscall; |
| bool has_handler; |
| |
| /* It's a lot of work and synchronization to add a new ptrace |
| * register for GDB to save and restore in order to get |
| * orig_i0 correct for syscall restarts when debugging. |
| * |
| * Although it should be the case that most of the global |
| * registers are volatile across a system call, glibc already |
| * depends upon that fact that we preserve them. So we can't |
| * just use any global register to save away the orig_i0 value. |
| * |
| * In particular %g2, %g3, %g4, and %g5 are all assumed to be |
| * preserved across a system call trap by various pieces of |
| * code in glibc. |
| * |
| * %g7 is used as the "thread register". %g6 is not used in |
| * any fixed manner. %g6 is used as a scratch register and |
| * a compiler temporary, but it's value is never used across |
| * a system call. Therefore %g6 is usable for orig_i0 storage. |
| */ |
| if (pt_regs_is_syscall(regs) && |
| (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) |
| regs->u_regs[UREG_G6] = orig_i0; |
| |
| #ifdef CONFIG_COMPAT |
| if (test_thread_flag(TIF_32BIT)) { |
| do_signal32(regs); |
| return; |
| } |
| #endif |
| |
| has_handler = get_signal(&ksig); |
| |
| restart_syscall = 0; |
| if (pt_regs_is_syscall(regs) && |
| (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) { |
| restart_syscall = 1; |
| orig_i0 = regs->u_regs[UREG_G6]; |
| } |
| |
| if (has_handler) { |
| if (restart_syscall) |
| syscall_restart(orig_i0, regs, &ksig.ka.sa); |
| signal_setup_done(setup_rt_frame(&ksig, regs), &ksig, 0); |
| } else { |
| if (restart_syscall) { |
| switch (regs->u_regs[UREG_I0]) { |
| case ERESTARTNOHAND: |
| case ERESTARTSYS: |
| case ERESTARTNOINTR: |
| /* replay the system call when we are done */ |
| regs->u_regs[UREG_I0] = orig_i0; |
| regs->tpc -= 4; |
| regs->tnpc -= 4; |
| pt_regs_clear_syscall(regs); |
| /* fall through */ |
| case ERESTART_RESTARTBLOCK: |
| regs->u_regs[UREG_G1] = __NR_restart_syscall; |
| regs->tpc -= 4; |
| regs->tnpc -= 4; |
| pt_regs_clear_syscall(regs); |
| } |
| } |
| restore_saved_sigmask(); |
| } |
| } |
| |
| void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags) |
| { |
| user_exit(); |
| if (thread_info_flags & _TIF_UPROBE) |
| uprobe_notify_resume(regs); |
| if (thread_info_flags & _TIF_SIGPENDING) |
| do_signal(regs, orig_i0); |
| if (thread_info_flags & _TIF_NOTIFY_RESUME) { |
| clear_thread_flag(TIF_NOTIFY_RESUME); |
| tracehook_notify_resume(regs); |
| } |
| user_enter(); |
| } |
| |